G/TBT/N/USA/1917  
14 September 2022  
(22-6793) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  UNITED STATES OF AMERICA  
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:   
National Highway Traffic Safety Administration (NHTSA), Department of Transportation 
(DOT) [1948]  
Name and address (including telephone and fax numbers , email and website 
addresses, if available) of agency or authority designated to handle co mments 
regarding the notification shall be indicated if different from above:   
Please submit comments to: USA WTO TBT Enquiry Point, Email: usatbtep@nist.gov  
3. Notified under Article 2.9.2 [X], 2.10.1 [  ], 5.6.2 [X], 5.7.1 [  ], 3.2 [  ], 7.2 [  ], 
other :  
4. Products covered (HS or CCCN  where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  Heavy -
duty engine and vehicle fuel efficiency; Spark -ignition reciprocating or rotary internal 
combustion piston engines. (HS code(s): 8407); Compression -ignition internal 
combustion piston engines (diesel or semi -diesel engines). (HS code(s): 8408); Tractors 
(other than tractors of heading 87.09). (HS code(s): 8701); Motor vehicles for the 
transport of ten or more persons, including the driver.  (HS code(s): 8702); Motor cars 
and other motor vehicles principally designed for the transport of persons (other than 
those of heading 87.02), including station wagons and racing cars. (HS code(s): 8703); 
Motor vehicles for the transport of goods. (HS cod e(s): 8704); Special purpose motor 
vehicles, other than those principally designed for the transport of persons or goods (for 
example, breakdown lorries (wreckers), crane lorries (mobile cranes), fire fighting 
vehicles, concrete mixer lorries (concrete -mixers), road sweeper lorries (road sweepers), 
spraying lorries (spraying vehicles), mobile workshops, mobile radiological units). (HS 
code(s): 8705); Quality (ICS code(s): 03.120); Air quality (ICS code(s): 13.040); Test 
conditions and procedures in general (ICS code(s): 19.020); Road vehicles in general 
(ICS code(s): 43.020); Internal combustion engines for road vehicles (ICS code(s): 
43.060); Commercial vehicles (ICS code(s): 43.080); Passenger cars. Caravans and light 
trailers (ICS code(s): 43.100)  
5. Title, number of pages and language(s) of the notified document:  Improvements 
for Heavy -Duty Engine and Vehicle Fuel Efficiency Test Procedures, and Other Technical 
Amendments; (47 page(s), in English)  G/TBT/N/USA/1917  
 
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  6. Description of content:  Proposed rule - The National Highway Traffic Safety 
Administration (NHTSA) is proposing minor technical amendments to the test procedures 
for heavy -duty engines and vehicles to improve accuracy and reduce testing burden. 
These amendments affect the certification procedures for fuel ef ficiency standards and 
related requirements. These proposed amendments increase compliance flexibility, 
harmonize with other requirements, add clarity, correct errors, and streamline the 
regulations. Given the nature of the proposed changes, NHTSA does not  expect either 
significant environmental impacts or significant economic impacts for any sector.  
7. Objective and rationale, including the nature of urgent problems where 
applicable:  Prevention of deceptive practices and consumer protection; Protection of the 
environment; Quality requirements; Harmonization; Cost saving and productivity 
enhancement  
8. Relevant documents:   
87 Federal Register (FR) 56156, 13 September 2022; Title 49 Code of Federal Regulations 
(CFR) Part 535:  
https://www.govinfo.gov/content/pkg/FR -2022-09-13/html/2022 -17134.htm  
https://www.govin fo.gov/content/pkg/FR -2022-09-13/pdf/2022 -17134.pdf  
This proposed rule is identified by Docket Number NHTSA -2020-0079. The Docket Folder 
is available on Regulations.gov at https:// www.regulations.gov/docket/NHTSA -2020-
0079/document  and provides access to primary and supporting documents as well as 
comments received. Documents are also accessible from Regulations.gov  by searching 
the Docket  Number. WTO Members and their stakeholders are asked to submit comments 
to the USA TBT Enquiry Point  by or before 4pm Eastern Time  on 14 November 2022. 
Comments received by the USA TBT Enquiry Point from WTO Members and their  
stakeholders will be shared with the regulator and will also be submitted to the Docket  
on Regulations.gov if received within the comment period.  
G/TBT/N/USA/1620 and subsequent addenda and revisions  - Improvements for Heavy -
Duty Engine and Vehicle Test Procedures, and Other Technical Amendments identified by 
Docket Number EPA-HQ-OAR-2019-0307. 
9. Proposed date of adoption:  To be determined  
Proposed date of entry into force:  To be determined  
10. Final date for comments:  14 November 2022  
11. Texts available from:  National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available , of other body:   
https://members.wto.org/crnattachments/2022/TBT/USA/22_6127_00_e.pdf